不同变质程度煤氧化特征指标量化分析  

Quantitative analysis of oxidation characteristic indicators of coal with different metamorphic degrees

作　　者：郭宇 冯全超 雷昌奎 年军 白亚娥 GUO Yu;FENG Quanchao;LEI Changkui;NIAN Jun;BAI Ya'e(Shaqu No.I Coal Mine,Huajin Coking Coal Co.,Ltd.,Lyuliang 033000,China;School of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shaanxi Shanli Technology Development Co.,Ltd.,Xi'an 710075,China;Department of Mining and Architectural Engineering,Shenmu Vocational and Technical College,Yulin 719300,China)

机构地区：[1]华晋焦煤有限责任公司沙曲一号煤矿,山西吕梁033000 [2]太原理工大学安全与应急管理工程学院,山西太原030024 [3]陕西山利科技发展有限责任公司,陕西西安710075 [4]神木职业技术学院矿业建筑工程系,陕西榆林719300

出　　处：《煤矿安全》2024年第9期30-39,共10页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(52204229);山西省基础研究计划青年科学研究资助项目(20210302124349);山西省高等学校科技创新资助项目(2021L054);陕西省教育厅2023年度一般专项科研计划资助项目(23JK0429)。

摘　　要：为了研究不同变质程度煤氧化特征指标变化规律,采用程序升温实验系统分别对不黏煤(BN)、气肥煤(QF)和1/3焦煤(1/3JM)氧化过程进行了测试分析,确定了不同氧化阶段的表观活化能,量化计算了煤自燃极限参数变化特征。结果表明:低变质程度煤的表观活化能比高变质程度煤的低,BN、QF、1/3JM煤样平均表观活化能分别为39.90、65.28、69.43 kJ/mol,煤的表观活化能与其变质程度呈正相关关系,低变质程度煤自燃危险性更高;同一煤种不同阶段的表观活化能也不相同,BN、QF和1/3JM煤样阶段一表观活化能分别为55.28、75.05、80.79 kJ/mol,阶段三则分别为23.23、59.07、61.50 kJ/mol,整体随氧化反应深入而降低;3个煤种自燃极限参数极值点温度分别为50.3、61.5、59.7℃,低变质程度煤比高变质程度煤的极值点温度要低;相同条件下,低变质程度煤最小浮煤厚度和下限氧气体积分数更小,上限漏风强度更大,更容易发生自燃,而变质程度相近的煤种,其氧化特征参数接近。In order to study the changes of oxidation characteristics of coal with different degrees of metamorphism,the oxidation process of non-sticky coal(BN),gas-fat coal(QF)and 1/3 coking coal(1/3JM)was tested and analyzed by temperature programmed experiment system,the apparent activation energy of different oxidation stages was determined,and the change characteristics of spontaneous combustion limit parameters of coal were quantitatively calculated.The results show that the apparent activation energy of coal with low metamorphism is lower than that of coal with high metamorphism.The average apparent activation energy of BN,QF and 1/3JM coal samples is 39.90,65.28 and 69.43 kJ/mol,respectively.The apparent activation energy of coal is positively correlated with its metamorphism,and the spontaneous combustion risk of coal with low metamorphism is higher;the apparent activation energy of the same coal at different stages is also different.The apparent activation energy of BN,QF and 1/3JM coal samples at stage 1 is 55.28,75.05 and 80.79 kJ/mol,respectively,and that of stage 3 is 23.23,59.07 and 61.50 kJ/mol,respectively,which decreases with the depth of oxidation reaction;the extreme temperature points of the three coal spontaneous combustion limit parameters are 50.3,61.5 and 59.7℃,respectively.The extreme point temperatures of low-metamorphic coals are lower than those of high-metamorphic coals;under the same conditions,the minimum floating coal thickness and lower oxygen volume fraction of low metamorphism coal are smaller,the upper air leakage intensity is larger,and the spontaneous combustion is more likely to occur.

关 键 词：不同变质程度煤 表观活化能 极限参数 煤自燃 氧化特征 

分 类 号：TD752.2[矿业工程—矿井通风与安全]